prop

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Related to propping: propping up, fender, bottle propping

prop

A device of sturdy material used to support or hold something in place.

mouth prop

A metal or rubber device inserted between the jaws to maintain the mouth in an open position. Synonym: bite block
References in periodicals archive ?
While much can be said about the proper technique for hand propping, every single procedural detail and every single accident report supports two, make that three, inviolable rules:
An engine should not be hand-propped unless two people, both familiar with the airplane and hand propping techniques, are available to perform the procedure.
When hand propping is necessary, the ground surface near the propeller should be stable and free of debris.